Schofield, Gordon, Andrew McGinn, Natacha Frachon, and Heather McHaffie. 2007. “Plant Collecting for the Ecological Garden and the Scottish Heath Garden at the Royal Botanic Garden Edinburgh”. Sibbaldia: The International Journal of Botanic Garden Horticulture, no. 5 (October):129-39. https://doi.org/10.24823/Sibbaldia.2007.13.